Power shovel



H. in. DOERING.

POWER SHUVEL ED FEB.

APPLICATION HL 23,192). I Patanted Dec. 12, 192.2

l atented in et. 12, "i222 stares HEITRY I. DOERING, E ERIE, PENNSYLVANIA, ASSIGNOR TO BALL ENGINE 03F ERIE, PENNSYLVANIA, A CORPORATION OF PEHHSYLVAtNIA T0 aZZ whom it may concern:

Be it known that I, HENRY L. Donnme, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in Power Shovels, of which the following is a specification.

The shovel forming the subject of this invention is particularly designed for digging trenches and here it is desirable to have the shovel in advance of the trench so that it may be supported on the round to be dug. The difiiculty' is to so handle the dipper as to cut in. this relation and still have it so that it maybe emptied with convenience and certainty. In the present invention this is accomplished. V

The invention is illustrated in the accompanying drawings as follows Fig. 1- shows a side elevation of the shovel.

Fig. 2 a View with, the dipper in an elevated position prior to emptying.

Fig. 3 a View of the position of the dipper after it is swung to position to empty.

1 marks the shovel frame, 2 the usual r0- tating platform, 3 a boom mounted on the front end of the platform, and 4 the supporting rod for the boom, thisrod extending over the strut 5 to the platform.

The dipper stick 6 is of the 'usual con struction. It has a rack 7 along one face operating on a gear 8. The dipper stick is handled by a crowding engine 9 mounted on the boom, the engine operating the crank shaft 10 and the crank shaft 10 being connected by a gear (not shown) with a gear 11. The gear 11 is on a shaft 12 which-also carries the gear 8'.

A hoisting cable 13 operates over a pulley 14 at the upper, or outer end of the boom and is carried over adrum 15, the drum being actuated from a gear 16 and'the gearbeing driven from an engine 17 in the usual manner. A pull-in cable 18 is carried over a pulley 19 on the lower end of the boom to a drum 20. The drum 20 is driven from a gear 21 which is connected with the gear 16, or'other convenient mechanism with the engine in the usual manner. These drums have the usual control actuated by the levers and so that the drums may be released or thrown into operation as desired and each drum is supplied with the usual rowan SHOVEL.

Application filed February 28, 1921. Serial No. 447,264.

brake actuated by the brake These parts are well. known and are crdinary parts of a steam shovel. A bracket 22 is fixed on the end of the dipper stick anda dipper 23 is pivotaliy mounted means of a pin 24 on the bracket A cover 25 extends fromthe bracket and i fixed relative to the bracket, being i. place by a brace 26 extendingirom the cover back to the bracket. The bracket has an extension 27 onthe end of which is a s 28 which limits the swinging of the dip; '2 relative to the dipper stick so as to position the cutting ed e 23, of the dipper with are lation to the ipper stick.

The pull-in cable 18 runs under a pulley 29 in the bracket 22 and over a puliey and is secured to the rear end of the dipper.

It will be observed that the cutting edge of the dipper faces the platform. in opera tion after the dipper stick is lowered through the action of the cable 13 as it is played out the pull-in line 18 is drawn in, thus swinging the dipper toward the piatform and carrying the cutting edge into the face of the trench. The vertical position of the dipper during this action may be con ,veniently controlled by the crowding en'- gine. Afterthe dipper has received its lead the haul-1n line 18 1s released and the pnil up km 13 1s.operated and the crowding gine is heldso that the dipper swings on i the gear 8 as a pivot upwardly. As the dipper stick swings upwardly the dipper through gravity swings on the pivot until the front face of the dipper engages the cover 25. At the extremeupward iiitt o;

the stick the dipper and parts are in the position shown in Fig. 2. The dipp is held in this position, the boom swung over the side and the pull-in line is then put under strain and this pulls the rear end of the dipper up to the stop 28, thus inverting the dipper and swinging it away from the cover so that the material in the dipper is crap tied. The dipper is then swung over the trench and the hoisting line released allowing the dipper to drop to the face of'the work and the operation is repeated.

It is desirable wheng-the dipper is opened in order to assist in 'he the cables to catch th s dipper in theopen P S i9P after .is anditer easy handling of purpose a catch 31 is arran ed on the dip per in position to be engage by a latch 32.

The latch is pivoted on the pin 33 in. the

to hold the latch in engagement with the catch. In this way the line 18 may be freely released as the di peer is lowcred'to its work. When it has reac ied the position to operate, the weight 34 passes over the center of the pivot 33 and thus movesathe latch out of engagement with the catch. The ull-ln line holds the dipper in POSltIO'II" with the stop as it is advanced into the work.

What I claim as new is':- A

i. In a power shovel, the combination 0 a shovel platform; a dipper stick; devices for actuating the stick from the latform; a dipper pivoted on the stick and avingits cutting edge facing the platform; and a line connected with the dipper and directioned to act as a pull-in line to effect the cutting movement of the dipper, said line swinging the di per to empt the same.

2. Iii a power s'iovel, the combination of a shovel platform; a dipperstick; devices for actuating thedipper stick from the platform; a dipper pivoted on the stick and having its cutting edge facing the platform; and a stop limiting the relative movement between the stick and dipper to position the cutting .edge of the dipper relatively to the work.

3'. In a powcrshovcl, the combination of a shovel platform; a dipper stick' devices for actuating the dipper stick'fi'om the platform; a dipper [)IVOiQClOIl the stick and having its cutting edge facing the platform; and a stop limiting the swinging movement of the dipper to hold the dipper relatively to the stick as the dipper is advanced into the work.

4. In a power shovel, the combination of a shovel platform; a dipper-stick; devices actuating the stick from the platform; a dipper pivoted on the stickand having its cutting edge facing the platform; a stop limiting'the movement of the dipper relative to the dipper stick; and a line actuated from the platform and connected to the dipper for swinging the dipper against the I stop. I

5. In a power shovel, the combination of a shovel platform; a dipper stick; devices actuating the stick from the platform; a dipper pivoted on the stick and. having its cutting edge facing the platform; a stop limiting the movement of the dipper relative to the dipper stick; and a line actuated from the platform and connected to the dipper for swinging the dipper against the stop, said line being positioned to act as a pull-in line. c

6. In a power shovel, the combination of a shovel platform: a dipper stick; devices for actuating thestick mm the platform;

a dipper pivoted on the stick and having its cutting edge facing the platform; a guiding means on the stick; a cable extending over thejguidin, means connected with the dipper for swinging the dipper relatively to the stick; and a sto for tpositionigg the dipper as it is actuate by t e cable.

8. In a power shovel, the combmation of a shovel platform; a di' per stick; 'evi actuating the stick om the platform a bracket arranged on the stick; a dipper pivotall mounted on the bracket; a stop on the hrac 'et limitin 'the swinging movement of the dipper; pul eys mounted on the bracket-1- and a cable carried under one alley and over another on'the bracket an connected with the dipper, in position to move the dipper a ainst the stop. v l

9. n a power 3 ovel the combination of a shovel platform; a dipper stick; devices for actuating the stick from the platform; a

dipper pivoted on the stick and having its cutting edge facing the platform; means for swinging the dipper on the stick to move it to cutting position and to empty the same; and a catch for locking the dipper with the stick 'in one position and automatically re leasing the stick in another position.

1 10. In a power shovel, the combination of a shovel latform; a dipper stick; devices for actuating the stick from the platform ;-a

dipper pivoted on the stick and having its cutting edge facing the platform; means for for swinging the dipper on the stick to move it to cutting position and to empty the same;

and a catch for engaging the dipper and looking it with the stick as the dipper is swung to emptying position and automatitally releasing the dipper as it is swung to cutting position. I

1].. In a power shovel, the combination of a shovel platform; a dipper stick; devices for actuating the stick from the platform; a dipper pivoted on the stick and having itscutting edge facing the platform; means for swinging the dipper to'cutting position and to emptying position; and a cover against which the dipper swings as the dipper stick is elevated.

'12. In a power shovel, the combination of a shovel platform a dipper stick; devices for actuating the stick from the platform; a dipper pivoted on'tho stick and having its cutting (alga facing the platform; means for swinging the dipper to cutting position and foi'actuating the stick from the platform; a to emptying position; and a. cover against which the dipper swings by gravity as the the same to emptying position, said line actdippeistick is elevated. ing as a pull-in ine; and a cover fixated on the 13. In a power shovel, the combination of stick in position to close over the dipper as 10 a latform; a dipper stick; devices for actuit swings with the lifting of the stick. I; 5 ating the stick from the platform; a dipper In testimony whereof I have hereunto set pivotally mounted on the stick; a line conmy hand. i nected with the dipperand adapted to swing HENRY L. DOERING, 

